First report of three protozoan parasites (a haplosporidian, Marteilia sp. and Marteilioides sp.) from the Manila clam, Venerupis (=Ruditapes) philippinarum in Japan.
First report of three protozoan parasites (a haplosporidian, Marteilia sp. and Marteilioides sp.) from the Manila clam, Venerupis (=Ruditapes) philippinarum in Japan.
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日本首次报道菲律宾马尼拉蛤 (Venerupis (=Ruditapes)) 中的三种原生动物寄生虫（单孢子虫、Marteilia sp. 和 Marteilioides sp.）。
DOI：
10.1016/j.jip.2004.12.001
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发表时间：
2005
影响因子：
3.4
通讯作者：
K. Ogawa
中科院分区：
文献类型：
--
作者：
N. Itoh;K. Momoyama;K. Ogawa
最近，菲律宾蛤仔（Venerupis（=Ruditapes）philippinarum）的自然种群在日本急剧减少。为了澄清数量下降的原因，每月从山口对蛤蜊进行取样并进行组织学观察，在此期间发现了三种原生动物寄生虫。透射电子显微镜观察结果表明，这些寄生虫是未鉴定的单孢子虫在结缔组织中，Martelia sp.在消化腺和Martelioides sp.在卵母细胞。组织病理学观察表明，Martelia sp.和Martelioides sp.对寄主无致病性。然而，感染单孢子虫可能会对蛤产生负面影响。这些寄生虫的流行率低，应进行进一步调查，以澄清其分类地位，并建立任何致病性蛤。
Recently, natural stocks of the Manila clam, Venerupis (=Ruditapes) philippinarum, have been drastically reduced in Japan. To clarify the reason for this decline in number, clams were sampled monthly from Yamaguchi and processed for histological observations, during which three protozoan parasites were discovered. Transmission electron microscopy revealed that these parasites were unidentified haplosporidian in the connective tissues, Marteilia sp. in the digestive gland and Marteilioides sp. in the oocytes. Histopathological observations suggest that Marteilia sp. and Marteilioides sp. were not pathogenic to the host. However, infection with a haplosporidian may have a negative impact on the clams. The prevalence of these parasites was low and further investigations should be undertaken to clarify their taxonomic status and establish any pathogenicity to clams.